Quoterodocop
You can right-click ANY folder in your Bookmarks list (create one if no one exists inside Bookmarks) and select Set as Toolbar Folder from context menu.

Gotcha!

Thanks, I saw that, but it's not quite what I'm trying to do.

What I'd like to do is create a Toolbar Folder that contains individual URLs from various other Bookmarks folders--for instance, the NYTimes url from my News folder; the eBay url from my Shopping folder; the DataFileHost from my Storage folder.

I don't wish to turn any existing Bookmarks folder into the Toolbar Folder.

If you wish (and it's possible on this forum) I can upload an image file of my Opera browser to illustrate what I mean.